Carbon

Element 6 · Nonmetal

Specimen

Atomic number
6
Atomic mass
12.011
State at room temperature
Solid
Melting point
3,550 °C
Boiling point
3,825 °C
Density
2.267 g/cm³
Discovered
Ancient

Physical data from PubChem.1

Can I eat it?

In food and water
Your body needs it. Carbon is in food molecules such as glucose. After oxygen, carbon is the most common element in the human body. 2

See every element.

The atom

C
ShellElectrons
1 (K) 2
2 (L) outermost 4
Total6

Configuration [He] 2s² 2p²

2s ↑ ↓
2p ↑ ↑
A shell diagram: each ring is an electron shell and each dot is one electron. The nucleus holds 6 protons. The outermost shell is shown in red. Electrons do not travel on rings: they fill orbitals, regions where an electron is likely to be found. The boxes are those orbitals for the electrons outside the He core, with one arrow per electron.

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Sources

  1. 1

    National Center for Biotechnology Information (PubChem), 2026. Periodic Table of Elements .

    Atomic mass, electron configuration, melting and boiling points, density and discovery year for all 118 elements.

  2. 2

    OpenStax, Rice University, 2022. Anatomy and Physiology 2e, section 2.1: Elements and Atoms: The Building Blocks of Matter .

    • beginning with the most abundant: oxygen (O), carbon (C), hydrogen (H), and nitrogen (N)
    • It is always composed of the same three elements: carbon, hydrogen, and oxygen